Learning polygon constructor

摘要

this research is to study the drawing, in particular on the third angle and square and 5 angle, in the city, will be more accurate and faster time, the angle of the city to be able to have a purpose. the purpose of this research is to have the support of the transparent plate (10), the third angle is the first opening part (31) and a second opening part (32) and the third opening part (33) is equipped with a square of the city and the first opening part (41). and the fourth opening part (42) and (43), the fifth and the sixth uad6cubd80 bend (44) with the 5 angle, the city is the first opening part (51) and (52). the seventh and eighth opening part (53) and the opening (54) of the ninth and tenth opening part (55), with three angle, angle and angle of 4 to 5 city you can do.